Perpetual calendar



(No IlIo'dell) l v2-SIu1eets-Shee'nA 1. A. G. MASIUS. PERPETUAL CALENDAR.

No. 429,043. Patented May 27, 1890.

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' 2 sheets-sheet 2. A. G. MASIUS. PERPETUAL CALENDAR. No. 429,043. Patentd May 27, 1890.

Wz'w/esses' Inwenar:

UNITED STATESl PATENT OFFICE.

ALFRED G. MASIUS, OF EGG HARCR CITY, NEW JERSEY.

PERPl-:TUAL

CALENDAR.

SPECIFICATION forming part of Letters Patent No. 429,043, dated May 27, 1890.

Application filed March 21l 1890.

To all whom it may concern:

Be it known that I, ALFRED G. MASIUS, of Egg Harbor City, in the county of Atlantic and State of New Jersey, have invented certain new and useful Improvements in Perpetual Calendars; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification.

My invention relates to an improvement in perpetual calendars; and it consists in the peculiar arrangement of parts to be fully described hereinafter, and pointed out in the claims.

The object of my invention is to produce a calendar of the character known as perpetual calendars, and to so arrange the figures and to so construct the parts that by the lateral adjustment of one part of the calendar in relation to the other any future or past day of the week or month of any year ad infinitum can be instantly ascertained, or the two parts set for any current year and secured in that relative relation by any suitable mechanical arrangement.

Figure l of the drawings represents a plan view of a calendar which embodies my invention complete. Fig. 2 is a detached plan view of the under or lower part of my calendar, and which contains the figures representing the days of the month.

In constructing my calendar I preferably form the lower stationary part A and the upper movable portion B of card-board of a suitable thickness to give them the required `stiffness and rigidity to enable them to beconveniently handled. However, if it should be desired, both the said upper and lower parts may be made of thinwood boards and the iigures printed either directly upon the boards or upon a piece of paper, which will then be secured to the boards in any convenient manner. The lower portion A will be provided with suitable guiding and supporting ears or projections C, in which the upper and lower edges of the part B loosely fit, whereby it can be freely moved back and forth over the face of the lower portion A,

Serial No. 344,828. (No model.)

divided into two months crosswise and into twelve months lengthwise, thus representing upon their face twenty-four months. The vertical columns have each an index letter, number, or distinguishing character of any convenient or desired kind or nature, and the index-character of the vertical columns of the leap-year group E will be distinguished from the index-characters of the group F. This is preferably done by printing the indexcharacters of the leap-year group of a diiferent color from that used in printing the indexletters of the group F.' However, these may be distinguished in many other ways-such as using numerals for one group and letters for the other, or letters or numerals of different styles for each group, respectively, or characters of any description can be used. I preferably use letters, however, and place them in alphabetical order, as shown, for the purpose of convenience, as will hereinafter appear.

The upper movable portionB is preferably, though not necessarily, secured to the lower portion A by means of suitable guideways, as before described; but it may be entirely separate and disconnected from the lower portion without departing in any manner from my invention.

Made in the upper portion B is a longitudinal opening` H, which is of alength equal to the length of each of the groups E F, as shown, and of a width just sufficient to allow seven vertical rows of the figures in the groups to be exposed, and which represents, therefore, seven days, or one week. Marked .upon one vor both sides of this opening H are the twelve months of the year, and they are placed in the proper position thereon to come opposite the monthly series of fig- IOO ures of the groups as divided by the heavy lines G. At one or both ends (preferably both) are marked the days of the week, as shown, and which are in spaces of a width equal to the width of the vertical columns of the two groups, so that they will register therewith as the part l is moved over the face of the part A.

Printed upon the part l are the four vertical columns I .I K L of figures, and which represent the years, each column having a hundred sets of figures, which thus constitute one century for each column. Opposite each set of ligures is an index-letter N, which correspond with the index-letters at the ends of the vertical columns of the groups E F. The column I represents from the year 1G00 to the year1700, t-he column .I the next century, the column K the next, and the column L the next, thus covering a period of four centuries. Those years which are leap-years in these columns have opposite them index-letters which will correspond with the indexletters at the ends of the vertical columns of the leap-year group E. An index-star is printed at the upper and lower right-hand corners of the opening II, the purpose of which will be described hereinafter.

The operation of my invention is as follows: It it is desired to know what day of the week December 5, 1837, was, the operator will turn to the column K, which contains the years froln 1800 to 1900, run down that column to the year 1837, notice the index letter or character, which in this instance is G. New move the part B over the face of the part A until the index-stars at the corners of the opening H register with the letter G of the group F, and it will be found that December 5, 1537, was Tuesday. If it should be known that a person was born in the year 1872 on Friday preceding the 1th of July, but the date not known, then by referring to the column K and to the year 1872 it is found that the leap-year index-letter N is opposite that year. Now nieve the opening ll over the group E until the index-stars register with the index-letter N of that year, and it will be found that the Friday preceding the ith of July of that year was the 28th day of June.

lVhile I show only four columns representing centuries, yet by adding to or subtracting the numeral four (l) or any multiple of four from anyone of these columns they will serve to indicate any desired century. For instance, if the twelfth century were wanted, the column I would be referred to, for by subtraeting four from that column, which begins with 1600,we have twelve. So, if we wanted the eighth century, by deducting eight from the column beginning with sixteen we have the eighth century, and so on Culiipi'nz'tum Or, if we wanted the tenth century, we would refer to the column K, for by deducting eight therefrom we have the tenth century. So, if we want a century in advance of the century represented inthe column Il, we add to the colunms inthe same manner that has just been described of subtracting for a past century.

A space l is left at one side of the part A for the printing of instructionsand useful in,- formation which it is appropriate to have accompany a calendar, such as interest-rules, dsc.

I do not desire to limit my invention to the precise arrangement and construction here shown, for they may be varied without departing from the spirit ofmy invention. For instance, `while I show the century-celu mns upon the movable part li, it will be readily seen that they could be placed upon the part A or upon a separate part and then referred to. I place them upon the part liA for convenience only. So, also, the position of the index-stars could be changed to a different point along the edges of the opening Il. and the position of the index-letters at the end of the columns in groups E F changed to correspond. So, also, the lower part A could be made movable and the part B stationary and the result be the same.

Having thus described my invention, I claim- 1. A calendar consisting of two parts, one having a series of months and the other an openi ng for exposing the said seri es of months, and months indicated at the side of the opening and one part movable in relation to the other, substantially as shown.

2. In a calendar, the combination of two parts, one havin g a series of months and indexcharaeters, the other having an opening for exposing the months, and a series of years having index-characters corresponding with the group of index-characters, the two parts being movable in relation to each other, for the purpose described.

3. In a calendar, the combination of two parts, one having a group of months and index-characters, the other having an opening equal in width to the width of one month and equal in length to the whole group, and a series of years having index-letters corresponding with the index-letters of the said group of months, the two parts being movable in relation to each other, substantially as shown and described.

l. In a calendar, the combination of two parts, one having a group of figures crossing it which represents two months, and figures arranged lengthwise of it which represent twelve months, an index-character foreach vertical row of said figures, and the other part having an opening which exposes in width one month and in length the twelve months, and a series of figures representing years having index-characters which correspond with the index-characters of the said group, the two parts being movable in relation to each other, substantially as set forth.

5. In a calendar, the combination of two parts, one part having a series of months and IOO IIO

index-characters, the other an opening having days of the weeks at the end and months at its side, a series of years and index-characters therefor to correspond with the said month index-characters, and an index-character at the end of the opening which is to be placed opposite the desired index-character at the end of the series of months, the two parts being movable in relation to each other, substantially as shown and described.

6. In a calendar, the combination of two parts, one part having a series of months and index-eharacters, the other an opening 'for exposing the months having week-days at its end and months at its side, and four columns of figures arranged to represent each a oentury, and index-characters for the years, the two parts being movable in relation to each other, substantially as set forth.

7. In a calendar, the combination of two parts, one part having two separate groups of months, one representing leap-years and the other the common years, distinguishing index-characters for each group, and the other part with an opening for exposing the said months, week-days at the ends and months at the sides, and a series of years having distinguishing index-characters for the leap and common years, which, respectively, oorrespond with the index-characters for the groups of months, substantially as specified.

In testimony whereof I aiix my signature in presence of two witnesses.

ALFRED G. MASIUS. Vitnesses:

ALLEN S., PATTIsoN, V. P. I-IOFMANN. 

